The policy, which has outraged conservationists, states that all white, bull and tiger sharks more than three metres long can be caught and killed.

Drum lines are expected to be set off Perth beaches next week.

Piers Verstegen from the Conservation Council says the community should be outraged.

"This is the first shocking results of a policy which has no science behind it, no evidence that it will actually work and has not had a full investigation of the environmental impacts," Mr Verstegen said.

"So really this is a very sad day for Western Australia and certainly a very sad day for our sharks."

More anti-shark cull rallies are set to take place across the nation this week.

Anti-cull campaigner Natalie Banks organised a rally at Cottesloe Beach earlier this month and says another one is planned for this Saturday across Australia and New Zealand.

She says it is disappointing the previous rally did not change the government's mind.

"A lot of the community have spoken out in anger and disgust about what has happened, it's a sad day for a lot of people who have spoken out and just did not want this to occur," she said.

"We're very disappointed that the WA Government isn't listening to the voices of the thousands of people who are not just attending our protests, but speaking out worldwide.

"There's been obviously support from people like Ricky Gervais and Sir Richard Branson, not just members of the community but people of key standing."